Minimum allowable value of water efficiency and water efficiency grades for water purifier
1 Scope
This document specifies the minimum allowable value of water efficiency, water efficiency grades, technical requirements and test methods for water purifier.
This document is applicable to small water purifiers for domestic or similar use which use municipal tap water or other centralized water supply as feed water and reverse osmosis membrane or nanofiltration membrane as the main purification element.
This document is not applicable to any large water purifier with a length or width or height of ≥ 2,000mm, a mass of ≥ 100 kg and a water flow of ≥ 3 L/min.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute indispensable provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 5749 Standards for drinking water quality
GB/T 5750 (all parts) Standard examination method for drinking water
GB 8538 National food safety standard - Methods for examination of drinking natural mineral water
GB/T19249 Reverse osmosis water treatment equipment
GB/T30307 Household and similar drinking water treatment equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 5749, GB/T 19249 and GB/T 30307 and the following apply.
3.1
water purifier
system consisting of one or more filter elements for drinking water treatment that can improve water quality
?
3.2
reverse osmosis water purifier
water purifier for improving water quality and for domestic or similar use, which uses municipal tap water or other centralized water supply as feed water and reverse osmosis membrane filter as the core treatment element
3.3
nanofiltration water purifier
water purifier for improving water quality and for domestic or similar use, which uses municipal tap water or other centralized water supply as feed water and nanofiltration membrane filter element as the core treatment element
3.4
purified water flow rate
quantity of water produced per unit time under specified test conditions
Note: the unit is L/min.
3.5
purified water production rate
ratio of the total purified water from a water purifier to the total inflow water after the feed water is purified under the specified test conditions
3.6
concentrate
water that has been concentrated due to increased salt content after treatment by a purifier
Note: the unit is L.
3.7
minimum allowable value of water efficiency for water purifier
minimum allowable purified water production rate and rated total water purification capacity of a water purifier under the specified test conditions
4 Water efficiency grades for water purifier
The water efficiency grades for water purifier are classified into 3 grades, with Grade 1 as the highest. The purified water production rates and nominal rated total water purification capacities of water purifiers of each grades shall meet the requirements of Table 1.
?
Table 1 Indicator for water efficiency grades for water purifier
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Water efficiency grades for water purifier
5 Technical requirements
6 Test methods
Annex A (Normative) Preparation method for test water
Annex B (Normative) Test device for purified water production rate
凈水機水效限定值及水效等級
1 范 圍
本文件規定了凈水機的水效限定值及等級、技術要求和試驗方法。
本文件適用于以市政自來水或其他集中式供水為原水，以反滲透膜或納濾膜作為主要凈化元件，供家庭或類似場所使用的小型凈水機。
本文件不適用于長度或寬度或高度≥２００ｍｍ、質量≥１０ ｋｇ，且凈水流量≥３Ｌ／ｍｉｎ的大型凈水機。
2 規范性引用文件
下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中，注日期的引用文件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本（包括所有的修改單）適用于本文件。
GB 5749 生活飲用水衛生標準
GB/T 5750 (所有部分) 生活飲用水標準檢驗方法
GB 8538 食品安全國家標準飲用天然礦泉水檢驗方法
GB/T19249 反滲透水處理設備
GB/T30307 家用和類似用途飲用水處理裝置
3 術語和定義
GB 5749、GB/T 19249和GB/T 30307界定的以及下列術語和定義適用于本文件。.
3.1
凈水機water purifier
由一個或若干個飲用水處理濾芯組成的能改善水質的系統。
3.2
反滲透凈水機reverse osmosis water purifier
以市政自來水或其他集中式供水為原水,以反滲透膜濾芯為核心處理元件,用于改善水質、供家庭或類似場所使用的凈水機。
3.3
納濾凈水機 nanofiltration water purifier
以市政自來水或其他集中式供水為原水,以納濾膜濾芯為核心處理元件,用于改善水質、供家庭或類似場所使用的凈水機。
?
3.4
凈水流量purified water flow rate
在規定的試驗條件下,單位時間內的產水量。
注:單位為升每分(L/min)。
3.5
凈水產水率purified water production rate
在規定的試驗條件下,原水經過凈化后,凈水機的總凈水量占總進水量的比率。
3.6
濃水 concentrate
經過凈水機處理后產生的含鹽量增加而被濃縮的水。
注:單位為升(L)。
3.7
凈水機水效限定值minimum allowable value of water efficiency for water purifier
在規定的試驗條件下,凈水機所允許的最小凈水產水率和額定總凈水量。
4 凈水機水效等級
凈水機水效等級分為3級,其中1級水效最高。各等級凈水機的凈水產水率和標稱的額定總凈水量應符合表1的規定。
表1凈水機水效等級指標值
水效等級 1級 2級 .3級
凈水產水率/% ≥65 ≥55 ≥45
額定總凈水量/L ≥4 000 ≥3 000 ≥2 000
